抑垢型无固相修井液的研究与应用

吕选鹏; 何风华; 刘德正; 张建华; 张伟辉

doi:10.3969/j.issn.1001-5620.2015.04.012

抑垢型无固相修井液的研究与应用

doi: 10.3969/j.issn.1001-5620.2015.04.012

1.
渤海钻探工程技术处,天津
2. 渤海钻探井下技术服务公司,天津

基金项目: 中国石油集团渤海钻探工程公司科研项目“无固相修井液体系研究与应用”(2014Z030K)。

详细信息

作者简介:
吕选鹏,高级工程师,1996年毕业于西南石油学院采油工程专业,从事井下技术管理、技术推广应用工作。地址:天津经济技术开发区黄海路106号渤海钻探公司工程技术处;邮政编码300457;电话(022)65326287;E-mail:luixp@cnpc.com.cn。

中图分类号: TE358.4
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出版历程
- 收稿日期: 2015-04-22
- 刊出日期: 2015-07-31

Study and Application of Scale Inhibitive Solids-free Workover Fluid

No. 106 Huanghai Road, Economy and Technology Development Zone, Tianjin 300457, China

摘要

摘要: 为解决氯化钙型修井液与碳酸氢钠型地层水结垢的问题,通过对抑垢剂、缓蚀助排剂、防膨剂、加重剂等外加剂的研究与优选,研制出以氯化钙液体为基液、密度为1.20～1.55 g/cm³ 的BH-1 抑垢型无固相修井液产品。经室内评价证实,该产品与碳酸氢钠型地层水配伍,对黏土矿物防膨率达97%,对油管钢的腐蚀速率与淡水相当,表面张力比淡水低43.8%,凝固点在-10～-55 ℃之间,与原油配伍,适用于硫酸钠、碳酸氢钠、氯化钙、氯化镁4 种类型地层水的油气水井压井作业。产品在库5-10 井等现场应用4 井次,均获得成功,显示出BH-1 抑垢型无固相修井液具有良好的应用前景。
- 抑垢型修井液 /
- 无固相修井液 /
- 地层水 /
- 配伍
Abstract: Calcium chloride workover fluid was modified through optimization of additives used in the workover fluid, such as scale inhibitor, corrosion inhibitive cleanup additive, swelling inhibitor and weighting agent, in an effort to solve the problem of scaling caused by calcium chloride workover fluid and sodium bicarbonate formation water. As a result of the modification, a calcium chloride solids-free workover fluid of 1.20-1.55 g/cm³ was developed. By treatment with BH-1, a scale inhibitor, the workover fluid is compatible with sodium bicarbonate formation water. It is highly efficient in clay inhibition, and has rates of corrosion to tubing steel that are equivalent to fresh water. This workover fluid has surface tension that is less than 43.8% that of fresh water, and freezing point between -10℃--55℃. It is compatible with crude oil, and is suitable for use in wells having sodium sulphate water, sodium bicarbonate water, calcium chloride water and magnesium chloride water. This workover fluid had been successfully applied in four wells.
- Scale inhibition /
- Solids free /
- Workover fluid /
- Formation water

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